"When VRF technology was introduced to the U.S. more than 10 years ago, few could have predicted how quickly the commercial market would embrace these new systems. Many initially thought of the equipment as a niche product that would find its place in select applications but felt it would never be considered a mainstream technology by the HVAC industry.

Fast forward a decade and not only has VRF technology been widely accepted by contractors and end users alike, virtually every major U.S. manufacturer is now offering these systems, as well. Contractors who were initially hesitant to offer VRF because they feared the systems were too complex or difficult to install found their fears allayed after the first installation. And then they became vocal advocates of VRF. Nearly immediately after, their competition started jumping on the bandwagon, too."